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[209.132.180.67]) by mx.google.com with ESMTP id c21si5557377oth.174.2020.01.09.06.49.50; Thu, 09 Jan 2020 06:50:03 -0800 (PST) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; dkim=pass header.i=@web.de header.s=dbaedf251592 header.b=N4UJD9Yn; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730660AbgAIMBQ (ORCPT + 99 others); Thu, 9 Jan 2020 07:01:16 -0500 Received: from mout.web.de ([212.227.15.3]:46645 "EHLO mout.web.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729113AbgAIMBQ (ORCPT ); Thu, 9 Jan 2020 07:01:16 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=web.de; s=dbaedf251592; t=1578571253; bh=MtuFhM24nmAwmDe9k5ReeWMFA1+3sNpHn7OcfJGEcXQ=; h=X-UI-Sender-Class:Subject:To:Cc:References:From:Date:In-Reply-To; b=N4UJD9YnoMzYi1VKfueXGLm6S2RjZ8M1Ao33pzFIsmX8GkwbTmKAUrzK9dA8GLA9q rqH9zRpDUDZvcEcJRsKuSHvZLrbBHPnZ17tss0aVRWBTFr7Qg+Jyi3Uzj69QVbV3CH oyFa9V0YoYQFEDPkuh0SqcEAij3WMBZEhK+TE/kI= X-UI-Sender-Class: c548c8c5-30a9-4db5-a2e7-cb6cb037b8f9 Received: from [192.168.1.2] ([93.135.1.10]) by smtp.web.de (mrweb001 [213.165.67.108]) with ESMTPSA (Nemesis) id 0MCqWJ-1ixX6M0Quh-009iAH; Thu, 09 Jan 2020 13:00:53 +0100 Subject: Re: [v2] coccinelle: semantic patch to check for inappropriate do_div() calls To: Julia Lawall , Wen Yang , cocci@systeme.lip6.fr Cc: kernel-janitors@vger.kernel.org, linux-kernel@vger.kernel.org, Gilles Muller , Greg Kroah-Hartman , Masahiro Yamada , =?UTF-8?Q?Matthias_M=c3=a4nnich?= , Michal Marek , Nicolas Palix , Thomas Gleixner References: <20200107170240.47207-1-wenyang@linux.alibaba.com> <9a2b7d00-442e-0c1b-73cc-aed2bbecd13a@web.de> From: Markus Elfring Autocrypt: addr=Markus.Elfring@web.de; 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Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.3.1 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: quoted-printable X-Provags-ID: V03:K1:5aYwA7S70RO6EmQuqK9G6MB1qflCOs2VzvPvtvC4OVEy+5kPEoj reNyD9BKxuJtE950FKoILjGt/z0S85jdJ1EM5Js76IFl487jWh3xayNuBJ7K3EapDI5LYar t6fpLWPmgFuR5pH6wHINZqvYCFCIx+ZXBl/Uy5bNplIyNg0cIyY/njOASpwFxq4R8XzUbn5 Um9rF4xnhcCHntJKqVFyA== X-Spam-Flag: NO X-UI-Out-Filterresults: notjunk:1;V03:K0:P+A7F8x5jR0=:CuI1FYWm0Ehek67SIKlz/O zjhylomqixm/79cKD2zG2uwWdv9+mgq6UOhfr7teA/2JCqg1x6bWFD+GaskriMWEyObh48Lj0 +tEqhBQjVl8kv5ZIsxj67cfvGdrtEbQeT7R6F84IQPgCw9b4OSgiBjVxqrAeGbBQpTbkLKC6R VxTF84Xr1bPuSg7AtHnhzde+nnjElnfUtOlUkirNH78vcxEAoTPQbsTNlI2l+NdFYlyWYGoL7 w0DlriciXkThyP7O5a9TaTz7Sl3qdAh+W0QayUkLxEYq0fUP7MoLfl+sdz2EgVmfDbz8ugFsm 21zdmTueE2v2N4CF/VWzVtG3wTqibs1VE4mYvJ1WjmSYH+ukNhw7kRAsIvTg5tjLbCmD0QVx0 qaTwGu09UKxdGre5fgSN/o1yRNNTJ6dG97Fx4LAr4xbDhd6Y40sTASHpUAYS+IGbj5PN4F89v OakNsOb8JZ5Qx3FCnw0/rdEXJvHovs839oZpIxdB4V0zd/NM10+O/uN24qjOxDDECxnT+I27U 4kLEHyE5GsbGfJjLv0ocvOnJQDBGGXxEZV7ArKn+ZALt8OkQZKhMM/pxRivyjbG3VMDlQtoxW 9jAAZFHszUc/GIZ55F2uPkDdxNviFTqVnkExOCB1FYprBZDxdUaKv3FItZFf/FTcbw0It6O/l 1R0ZCzmDytWBU3W2LEBul826lyH0sTtyzdaj172p4GykAfhmhmCQ2a/D7cPLlHNiBhy/cCn3t VuLzneEVviEBoSoXznZE9IF3wvnJ8uA6XtdU79zgoQR3kZgcEEJCpNFo/P0LYjBEvT493Uc+L Fvux07ns6DDtxsNkGAufFPTUUqoWuhRhDELzDVuqW6d4G35puYnOU7lQxzKyV9FGhnhwybfOP 1EVwtY9VlACFwnPS41+MoUXyGsDkaM9Bmqm6H5tgoa58GkbxEnp5fqSeetcCfV/jULNurvEwA XEC3gYP4Z9c984fmxAth7+saFQMtGukDSeKmU6qnbt8llh4SHUw2VXlORsYq79TakIq2G3Qa7 g3vY4rtIfXfmgk9sj7yASG1i6Sp1HnJoPMd/ba7nCPQzfLEQpz/srEAqUOvGc3uUlKE1ihXAa XtV1tMezcOYcr0mpn2cRUQDMsWxw4fKVONcARAci4ErPz7L4z1x0qKbC/IBcbWd2ikKkzfeuA HMBSpFidB1Kvvj4JxiaxpzNaHuPNSl9pHFZuN0JEbLrA0DtJ3F++V5TwME/6cdKpJnOPryRR/ EK+LuvGemPPhCBwC10ZWB3gM/fM1KUvvTzfCndC54wAOfRbIH49xBFahTcVg= Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org >> Thus I suggest now to split the source code search pattern into >> four separate rules. > > Why? Does the Coccinelle software ensure that a variable like =E2=80=9Cr.ul=E2= =80=9D contains really useful data even if the expected branch of the SmPL disjunction was occasionally not matched? Regards, Markus